US3490191A - Method for erecting buildings - Google Patents
Method for erecting buildings Download PDFInfo
- Publication number
- US3490191A US3490191A US668444A US3490191DA US3490191A US 3490191 A US3490191 A US 3490191A US 668444 A US668444 A US 668444A US 3490191D A US3490191D A US 3490191DA US 3490191 A US3490191 A US 3490191A
- Authority
- US
- United States
- Prior art keywords
- slabs
- columns
- edges
- concrete
- building
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/20—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of concrete, e.g. reinforced concrete, or other stonelike material
Definitions
- a method for erecting buildings includes the steps of providing a plurality of vertical columns arranged in rows.
- a plurality of prefabricated concrete floor slabs are provided, certain of said slabs being supported adjacent the edges thereof by said vertical columns so that no more than two slabs are supported by any particular column. Further slabs are supported adjacent the outer edges thereof by vertical columns, the inner edges of said further slabs being supported by outer edges of said first-mentioned slabs, the slabs beingprovided with cooperating protruding edges for this purpose, and the joint adjacent said protruding edges being completed with reinforcing means and concrete.
- the present invention relates to a method for erecting buildings having a frame-work comprising rows of vertically arranged columns supporting concrete floorings, or slabs, said method comprising the steps of first erecting said columns whereupon said floorings, which generally are prefabricated, are raised to their respective vertical positions and secured to the columns.
- the invention relates to building frame-works of the type generally referred to as the fiat-plate design.
- a frame-work is not erected by successive concrete casting of columns and floors at the site but by initial erection of the columnsand subsequent securing of the concrete slabs thereto the only method hitherto available has been thev so-called lift-slab method.
- suitable lifting devices generally hydraulic jacks, are mounted on the tops of the columns and by means of those devices the concrete slabs are lifted to their respective mounting levels.
- each slab must have such a size that it encloses two or more columns.
- the main object of the present invention is to provide a method for mounting building frame-works of the abovementioned type which does not suffer from the drawbacks or limitations above referred to, i.e. it should allow use of slim columns and mounting of the concrete floorings by use of conventional lifting devices, generally available at the building site, to wit ordinary lifting cranes.
- the slabs are lifted, mounted and secured in such a way'that the majority of columns do each support not more than two slabs so that at joints, parallel to but separated from an "ice imaginary line interconnecting an adjacent row of columns, the slabs on the one side of the joint are utilized to support the slabs at the other side thereof.
- FIGURE 1 is a perspective view showing erection of a frame-work according to the invention.
- FIGURE 2 is a lateral view of the frame-work shown in FIGURE 1.
- FIGURE 3 is a horizontal view of the frame-work and does particularly illustrate the relative shape and arrangement of the concrete slabs.
- FIGURE 4 is a horizontal view illustrating a preferred method for joining the slabs.
- FIGURE 4A is a section taken along line AA in FIGURE 4.
- FIGURE 4B is a section taken along line BB in FIGURE 4.
- the columns do further, at each storey, have suitable supporting brackets 2a (FIGURES 1 and 4A) for supporting the floorings.
- FIGURES 1 and 4A suitable supporting brackets 2a
- the columns can be very slim. While it is possible to use concrete columns, steel columns are usually preferred. Any cross-sectional form can be used but it has proved particularly economical to utilize tubular columns of rectangular cross-section.
- the flooring do preferably consist of high quality reinforced concrete.
- the invention is in the first place intended for application in the erection of buildings comprising a plurality of mutually like, substantially rectangular room units, each apartment or corresponding entity extending across the building body between the two longitudinal sides thereof. This means, stated in other words, that the walls separating the apartments are parallel to the gables. Under those circumstances it has proved possible and suitable to utilize floorings of two standard sizes only.
- the frame-work according'to the embodiment of the invention here illustrated has substantially two types of floorings only, viz. 1 substantially square slabs'3, arranged along the'longitudinal sides of the building, and larger rectangular slabs 4 mounted in a central row between the two outer rows of square slabs 3.
- FIGURE 2 which shows the building frame-work in end view, and FIGURE 3, do clearly show the arrangement of the slabs relatively thecolumns 2.
- the columns are not located in the crossings between the longitudinal and transversal slab joints,
- each transversal row of columns coincides with a lateral joint. This means that at no point in the framework do four slabs meet at one column. Instead, each column does only support two slabs-excepting the corner columns 2', each supporting one slab only, and one column 2" which supports three slabs (FIGURE 3).
- FIGURE 3 shows a building frame-work consisting of two house bodies in staggered parallel relationship and connected by an intermediate house body containing a staircase 5. It appears from the drawing that the floor slabs surrounding the staircase have a form deviating from that of the others and that in one place of the building one column (2") does actually support three floor slabs as above indicated.
- FIGURES 1-3 do also show that the larger floor slabs 4 are each supported directly by four columns 2, whereas each of the smaller slabs 3 is in that manner directly supported by two columns only, viz. those located at the longitudinal sides of the building.
- the drawing does also illustrate that the lateral edge of each individual slab 3 located in opposed relationship to the lateral edge at the facade is supported by an adjacent one of a larger slab 4 so that it is there supported by the columns in an indirect manner only.
- each of slabs 4 has been provided with suitable supporting means, such as a protruding edge.
- FIGURES 4 and 413 do clearly demonstrate one manner of arranging the joints between slabs 3 and 4.
- FIGURE 4B shows that each of slabs 3 and 4 has its top reinforcement 6 and 7, respectively, protruding perpendicularly t the direction of the joint so that loops 8 are formed.
- Those loops the general form of which can be U or J, are suitably in a manner known per se traversed by longitudinal reinforcement bars 9.
- the joint is in a conventional manner filled up with fine concrete.
- Joints l0 hitherto dealt with do accordingly extend in the longitudinal direction of the building.
- the transversal joints 11 are however arranged in quite another way.
- the slabs are at those joints mounted at a certain distance from each other, say 1.5- inches (4-12 cm.). This does in a simple way create a passage which can be used for location of tubes, pipes, air-conditioning drums, et cetera.
- the location of such installation equipment may be facilitated by use of slabs, the edges of which facing the joint have been given a special profile.
- the joint may in crosssection correspond to an upright or reversed V or the width may be greater at the centre of the joint than at the top and bottom edges of the slabs. It is not necessary to fill up joints 11 with concrete because they could simply be filled with sand after proper sealing of their bottoms.
- FIGURE 4A shows fixation of each pair of adjacent slabs 3 and 4 to the columns 2.
- the slabs have been provided with casting ingots 12 through which concrete is forced under pressure.
- the invention makes it possible on the one hand to use very slim columns which accordingly are cheap, easy to transport and handle and do not take up much space in the building (by way of example the crosssectional extension of the columns could be 4 x 6 inches) and, on the other, to eliminate the need of special and complicated lifting devices.
- the method according to the invention involves additional advantages.
- the columns do not have to be dimensioned for forces acting at their tops, the problem of attaining lateral stability during the mounting phase is correspondingly facilitated. Since due to the design of joints 10 it is not possible to expect them to withstand any substantial shearing forces it is as a rule necessary to erect at least portions of the gable walls to attain longitudinal stability. On the other hand, this yields a fully sufficient protection. Lateral stability can be obtained by use of conventional supporting arrangements. Further, the slabs are rigidly interconnected at each column.
- the present invention provides a method of erecting building frame-works of the fiat-plate type where slim columns are utilized and the plates brought into their mounting positions without any aid of lifting devices mounted on the columns so that at least one joint between parallel rows of slabs is separated from an adjacent row of columns.
- a method for erecting buildings comprising providing a plurality of vertically disposed spaced columns arranged in rows, providing a first plurality of prefabricated concrete floor slabs and a second plurality of prefabricated concrete floor slabs, raising said first plurality of slabs so as to support said first plurality of slabs on certain ones of said vertical columns adjacent the edges of said first plurality of slabs with said columns disposed at the joints between adjacent slabs, the edges of adjacent ones of said first plurality of slabs at said joints being spaced from one another, raising said second plurality of slabs and securing them adjacent the outer edges thereof to certain ones of said vertical columns, and supporting the inner edges of said second plurality of slabs on the outer edges of said first plurality of slabs to thereby support said second plurality of slabs in operative position.
- a method for erecting buildings comprising providing a plurality of vertically disposed spaced columns arranged in rows with said columns extending substantially throughout the height of the building, providing a first plurality of prefabricated concrete floor slabs and a second plurality of prefabricated concrete floor slabs, raising said first plurality of slabs and securing them to said vertical columns so as to support said first plurality of slabs solely on certain ones of said vertical columns adjacent certain edges of said plurality of slabs, raising said second plurality of slabs and securing them adjacent certain edges thereof to certain ones of said vertical columns, and supporting other edges of said second plurality of slabs on other edges of said first plurality of slabs to thereby support said second plurality of slabs in operative position.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
- Finishing Walls (AREA)
- Joining Of Building Structures In Genera (AREA)
- Rod-Shaped Construction Members (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Ceramic Products (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE1306266 | 1966-09-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3490191A true US3490191A (en) | 1970-01-20 |
Family
ID=20296752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US668444A Expired - Lifetime US3490191A (en) | 1966-09-28 | 1967-09-18 | Method for erecting buildings |
Country Status (11)
Country | Link |
---|---|
US (1) | US3490191A (de) |
BE (1) | BE704355A (de) |
CH (1) | CH467399A (de) |
DE (1) | DE1658884B1 (de) |
DK (1) | DK128292B (de) |
ES (1) | ES345495A1 (de) |
FI (1) | FI44940C (de) |
GB (1) | GB1196750A (de) |
NL (1) | NL6713133A (de) |
NO (1) | NO122723B (de) |
PL (1) | PL79249B1 (de) |
Cited By (29)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3921362A (en) * | 1974-03-18 | 1975-11-25 | Pablo Cortina Ortega | Method of and means for multi-story building construction |
US4391070A (en) * | 1980-02-29 | 1983-07-05 | Babcock-Bau Gmbh | Chimney |
US4408434A (en) * | 1979-06-19 | 1983-10-11 | Collins Leonard D | Multi-storey building and a prefabricated panel for such a building |
US4679374A (en) * | 1984-12-03 | 1987-07-14 | Robert Boehmig | Building construction method |
US5150552A (en) * | 1989-05-19 | 1992-09-29 | Davis Arzac Craig | Building system for extension of progressive housing |
US5372232A (en) * | 1994-03-23 | 1994-12-13 | Otis Elevator Company | Handrail drive pressure chain with soft rollers |
US20130067832A1 (en) * | 2010-06-08 | 2013-03-21 | Sustainable Living Technology, Llc | Lift-slab construction system and method for constructing multi-story buildings using pre-manufactured structures |
US8950132B2 (en) | 2010-06-08 | 2015-02-10 | Innovative Building Technologies, Llc | Premanufactured structures for constructing buildings |
US8978324B2 (en) | 2010-06-08 | 2015-03-17 | Innovative Building Technologies, Llc | Pre-manufactured utility wall |
US9027307B2 (en) | 2010-06-08 | 2015-05-12 | Innovative Building Technologies, Llc | Construction system and method for constructing buildings using premanufactured structures |
CN104884714A (zh) * | 2012-10-18 | 2015-09-02 | 迈尔希斯有限公司 | 多层建筑的施工方法、***和组件 |
US10041289B2 (en) | 2014-08-30 | 2018-08-07 | Innovative Building Technologies, Llc | Interface between a floor panel and a panel track |
US10094101B1 (en) * | 2017-12-29 | 2018-10-09 | Mohammad Omar A. Jazzar | Precast concrete system with rapid assembly formwork |
US20180355600A1 (en) * | 2014-03-04 | 2018-12-13 | Dongguan Shixi Intelligent Machine Manufacturing Co., Ltd. | Building structure and construction method for same |
US10260224B1 (en) * | 2017-12-29 | 2019-04-16 | Mohammad Omar A. Jazzar | Simplified precast concrete system with rapid assembly formwork |
US10260250B2 (en) | 2014-08-30 | 2019-04-16 | Innovative Building Technologies, Llc | Diaphragm to lateral support coupling in a structure |
US20190119900A1 (en) * | 2017-10-20 | 2019-04-25 | Ruentex Engineering & Construction Co., Ltd. | Construction method for a building |
US10323428B2 (en) | 2017-05-12 | 2019-06-18 | Innovative Building Technologies, Llc | Sequence for constructing a building from prefabricated components |
US10329764B2 (en) | 2014-08-30 | 2019-06-25 | Innovative Building Technologies, Llc | Prefabricated demising and end walls |
US10364572B2 (en) | 2014-08-30 | 2019-07-30 | Innovative Building Technologies, Llc | Prefabricated wall panel for utility installation |
US10487493B2 (en) | 2017-05-12 | 2019-11-26 | Innovative Building Technologies, Llc | Building design and construction using prefabricated components |
US10508442B2 (en) | 2016-03-07 | 2019-12-17 | Innovative Building Technologies, Llc | Floor and ceiling panel for slab-free floor system of a building |
US10676923B2 (en) | 2016-03-07 | 2020-06-09 | Innovative Building Technologies, Llc | Waterproofing assemblies and prefabricated wall panels including the same |
US10724228B2 (en) | 2017-05-12 | 2020-07-28 | Innovative Building Technologies, Llc | Building assemblies and methods for constructing a building using pre-assembled floor-ceiling panels and walls |
US10900224B2 (en) | 2016-03-07 | 2021-01-26 | Innovative Building Technologies, Llc | Prefabricated demising wall with external conduit engagement features |
US10961710B2 (en) | 2016-03-07 | 2021-03-30 | Innovative Building Technologies, Llc | Pre-assembled wall panel for utility installation |
US11054148B2 (en) | 2014-08-30 | 2021-07-06 | Innovative Building Technologies, Llc | Heated floor and ceiling panel with a corrugated layer for modular use in buildings |
US11098475B2 (en) | 2017-05-12 | 2021-08-24 | Innovative Building Technologies, Llc | Building system with a diaphragm provided by pre-fabricated floor panels |
US11339561B2 (en) * | 2016-07-06 | 2022-05-24 | PT Blink Limited | Method of constructing a modular building, a tray-like modular building component, and related method, and a modular building column assembly |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109578698B (zh) * | 2019-01-25 | 2019-07-05 | 湖北工业大学 | 一种装配式支吊架及其装配方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1957026A (en) * | 1932-04-23 | 1934-05-01 | Lasker Julius | Concrete building construction |
US2970676A (en) * | 1958-01-27 | 1961-02-07 | Olin Mathieson | Framework construction |
US3331181A (en) * | 1964-11-06 | 1967-07-18 | Schmidt Siegfried | Method of assembly of building elements for the making of ridged structures |
US3354593A (en) * | 1963-01-10 | 1967-11-28 | Zukas Simon Ber | Concrete beamless building construction |
-
1967
- 1967-09-18 US US668444A patent/US3490191A/en not_active Expired - Lifetime
- 1967-09-21 FI FI672521A patent/FI44940C/fi active
- 1967-09-22 GB GB43323/67A patent/GB1196750A/en not_active Expired
- 1967-09-22 DE DE19671658884 patent/DE1658884B1/de not_active Withdrawn
- 1967-09-22 NO NO169836A patent/NO122723B/no unknown
- 1967-09-25 PL PL1967122742A patent/PL79249B1/pl unknown
- 1967-09-26 CH CH1342067A patent/CH467399A/de unknown
- 1967-09-27 ES ES345495A patent/ES345495A1/es not_active Expired
- 1967-09-27 BE BE704355D patent/BE704355A/xx unknown
- 1967-09-27 NL NL6713133A patent/NL6713133A/xx unknown
- 1967-09-27 DK DK480067AA patent/DK128292B/da unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1957026A (en) * | 1932-04-23 | 1934-05-01 | Lasker Julius | Concrete building construction |
US2970676A (en) * | 1958-01-27 | 1961-02-07 | Olin Mathieson | Framework construction |
US3354593A (en) * | 1963-01-10 | 1967-11-28 | Zukas Simon Ber | Concrete beamless building construction |
US3331181A (en) * | 1964-11-06 | 1967-07-18 | Schmidt Siegfried | Method of assembly of building elements for the making of ridged structures |
Cited By (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3921362A (en) * | 1974-03-18 | 1975-11-25 | Pablo Cortina Ortega | Method of and means for multi-story building construction |
US4408434A (en) * | 1979-06-19 | 1983-10-11 | Collins Leonard D | Multi-storey building and a prefabricated panel for such a building |
US4391070A (en) * | 1980-02-29 | 1983-07-05 | Babcock-Bau Gmbh | Chimney |
US4679374A (en) * | 1984-12-03 | 1987-07-14 | Robert Boehmig | Building construction method |
US5150552A (en) * | 1989-05-19 | 1992-09-29 | Davis Arzac Craig | Building system for extension of progressive housing |
US5372232A (en) * | 1994-03-23 | 1994-12-13 | Otis Elevator Company | Handrail drive pressure chain with soft rollers |
US10190309B2 (en) * | 2010-06-08 | 2019-01-29 | Innovative Building Technologies, Llc | Slab construction system and method for constructing multi-story buildings using pre-manufactured structures |
US20130067832A1 (en) * | 2010-06-08 | 2013-03-21 | Sustainable Living Technology, Llc | Lift-slab construction system and method for constructing multi-story buildings using pre-manufactured structures |
US8978324B2 (en) | 2010-06-08 | 2015-03-17 | Innovative Building Technologies, Llc | Pre-manufactured utility wall |
US9027307B2 (en) | 2010-06-08 | 2015-05-12 | Innovative Building Technologies, Llc | Construction system and method for constructing buildings using premanufactured structures |
US9382709B2 (en) | 2010-06-08 | 2016-07-05 | Innovative Building Technologies, Llc | Premanufactured structures for constructing buildings |
US9493940B2 (en) * | 2010-06-08 | 2016-11-15 | Innovative Building Technologies, Llc | Slab construction system and method for constructing multi-story buildings using pre-manufactured structures |
US8950132B2 (en) | 2010-06-08 | 2015-02-10 | Innovative Building Technologies, Llc | Premanufactured structures for constructing buildings |
US10145103B2 (en) | 2010-06-08 | 2018-12-04 | Innovative Building Technologies, Llc | Premanufactured structures for constructing buildings |
CN104884714A (zh) * | 2012-10-18 | 2015-09-02 | 迈尔希斯有限公司 | 多层建筑的施工方法、***和组件 |
US20150308096A1 (en) * | 2012-10-18 | 2015-10-29 | Merhis Pty Ltd | Methods, systems and components for multi-storey building construction |
US10837166B2 (en) * | 2014-03-04 | 2020-11-17 | Dongguan Shixi Intelligent Machine Manufacturing Co. Ltd. | Building structure and construction method for same |
US20180355600A1 (en) * | 2014-03-04 | 2018-12-13 | Dongguan Shixi Intelligent Machine Manufacturing Co., Ltd. | Building structure and construction method for same |
US11060286B2 (en) | 2014-08-30 | 2021-07-13 | Innovative Building Technologies, Llc | Prefabricated wall panel for utility installation |
US11054148B2 (en) | 2014-08-30 | 2021-07-06 | Innovative Building Technologies, Llc | Heated floor and ceiling panel with a corrugated layer for modular use in buildings |
US10260250B2 (en) | 2014-08-30 | 2019-04-16 | Innovative Building Technologies, Llc | Diaphragm to lateral support coupling in a structure |
US10975590B2 (en) | 2014-08-30 | 2021-04-13 | Innovative Building Technologies, Llc | Diaphragm to lateral support coupling in a structure |
US10041289B2 (en) | 2014-08-30 | 2018-08-07 | Innovative Building Technologies, Llc | Interface between a floor panel and a panel track |
US10329764B2 (en) | 2014-08-30 | 2019-06-25 | Innovative Building Technologies, Llc | Prefabricated demising and end walls |
US10364572B2 (en) | 2014-08-30 | 2019-07-30 | Innovative Building Technologies, Llc | Prefabricated wall panel for utility installation |
US10900224B2 (en) | 2016-03-07 | 2021-01-26 | Innovative Building Technologies, Llc | Prefabricated demising wall with external conduit engagement features |
US10676923B2 (en) | 2016-03-07 | 2020-06-09 | Innovative Building Technologies, Llc | Waterproofing assemblies and prefabricated wall panels including the same |
US10508442B2 (en) | 2016-03-07 | 2019-12-17 | Innovative Building Technologies, Llc | Floor and ceiling panel for slab-free floor system of a building |
US10961710B2 (en) | 2016-03-07 | 2021-03-30 | Innovative Building Technologies, Llc | Pre-assembled wall panel for utility installation |
US11746520B2 (en) | 2016-07-06 | 2023-09-05 | PT Blink Limited | Method of constructing a modular building, a tray-like modular building component, and related method, and a modular building column assembly |
US11339561B2 (en) * | 2016-07-06 | 2022-05-24 | PT Blink Limited | Method of constructing a modular building, a tray-like modular building component, and related method, and a modular building column assembly |
US11098475B2 (en) | 2017-05-12 | 2021-08-24 | Innovative Building Technologies, Llc | Building system with a diaphragm provided by pre-fabricated floor panels |
US10724228B2 (en) | 2017-05-12 | 2020-07-28 | Innovative Building Technologies, Llc | Building assemblies and methods for constructing a building using pre-assembled floor-ceiling panels and walls |
US10487493B2 (en) | 2017-05-12 | 2019-11-26 | Innovative Building Technologies, Llc | Building design and construction using prefabricated components |
US10323428B2 (en) | 2017-05-12 | 2019-06-18 | Innovative Building Technologies, Llc | Sequence for constructing a building from prefabricated components |
US10760260B2 (en) * | 2017-10-20 | 2020-09-01 | Ruentex Engineering & Construction Co., Ltd. | Construction method for a building |
US20190119900A1 (en) * | 2017-10-20 | 2019-04-25 | Ruentex Engineering & Construction Co., Ltd. | Construction method for a building |
US10094101B1 (en) * | 2017-12-29 | 2018-10-09 | Mohammad Omar A. Jazzar | Precast concrete system with rapid assembly formwork |
US10260224B1 (en) * | 2017-12-29 | 2019-04-16 | Mohammad Omar A. Jazzar | Simplified precast concrete system with rapid assembly formwork |
Also Published As
Publication number | Publication date |
---|---|
FI44940B (de) | 1971-11-01 |
BE704355A (de) | 1968-02-01 |
NO122723B (de) | 1971-08-02 |
PL79249B1 (de) | 1975-06-30 |
ES345495A1 (es) | 1968-11-16 |
DE1658884B1 (de) | 1971-04-01 |
FI44940C (fi) | 1972-02-10 |
CH467399A (de) | 1969-01-15 |
GB1196750A (en) | 1970-07-01 |
NL6713133A (de) | 1968-03-29 |
DK128292B (da) | 1974-04-01 |
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